Yahoo Inc. (Nasdaq: YHOO) shares are up nearly 3 percent to $16.65 on premarket volume of nearly 100,000 shares. The stock may be gaining on comments Google had on its conference call regarding the return of large online advertisers in the first quarter. Oppenheimer this morning noted that it now has greater confidence that Google can exceed revenue and EBITDA estimates, and that it may exceed margin estimates. The research outfit raised its Yahoo target to $19 from $13.25. — Mike Tarsala